Search for dissertations about: "SALMON SALMO-SALAR"

Showing result 1 - 5 of 56 swedish dissertations containing the words SALMON SALMO-SALAR.

  2. 1. Migratory behaviour of Baltic salmon (Salmo salar L.) : adaptive significance of annual cycles

    Author : Torleif Eriksson; Lars-Ove Eriksson; Kees Groot; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Migratory behaviour; annual cycles; Baltic salmon; Salmo salar; annual time program; swimming behaviour; mortality; maturity; life history;

    Abstract : This thesis evaluates the adaptive significance of annual cycles on the migratory behaviour of Baltic salmon (Salmo salar L.). The studies have included field experiments as well as laboratory studies gf maturity and migratory behaviour patterns of smolts and postsmolts mainly from the Angerman river population. READ MORE

  4. 2. Regulation of Leptin by Sexual Maturation and Energy Status in Male Atlantic Salmon (Salmo salar L.) Parr

    Author : Susanne Trombley; Monika Schmitz; Sylvie Dufour; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Leptin; leptin receptor; Atlantic salmon; Salmo salar; sexual maturation; puberty; energy balance; hepatocytes; sex steriods; Biology with specialization in Comparative Physiology; Biologi med inriktning mot jämförande fysiologi;

    Abstract : Leptin is a peripheral adiposity signal and a key hormone in energy balance regulation in mammals, acting as a link between nutritional status and the endocrine reproductive axis. If this is also the role of leptin in fish is not fully understood. READ MORE

  5. 3. Effects of abiotic and biotic factors on hatching, emergence and survival in Baltic salmon (Salmo salar L.)

    Author : Eva Brännäs; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Baltic salmon; salmo salar; eggs; egg colour; alevins; fry; photoperiod; temperature; hatching; emergence pattern; synchronization; survival;

    Abstract : This thesis deals with important factors that affect the temporal organization of emergence and early survival of Baltic salmon (Salmo salar L.). The study population was obtained from the Norrfors hatchery (63°50'N,20°05'E), Umeälven (Ume river) in Northern Sweden. READ MORE

  6. 4. Migration and quality of landlocked Atlantic salmon smolt : Implications for conservation and management

    Author : Johnny R Norrgård; Eva Bergman; Larry A Greenberg; Monika Schmitz; Martyn Lucas; Karlstads universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; acoustic telemetry; hatchery; life history; migration mortality; regulated rivers; Salmo salar; salmon; smolt; trout; Biology; Biologi;

    Abstract : Atlantic salmon Salmo salar has a complex life cycle, including long migrations and habitat shifts for both juveniles and adults. As such, salmon populations are vulnerable to habitat degradation and fragmentation along their migratory routes. READ MORE

  7. 5. Some characteristics of the Baltic salmon (Salmo salar) L., population : individual growth, exploitation pattern and total mortality, from the smolt stage, as revealed by Swedish smolt taggings

    Author : Per-Olov Larsson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Salmon; Lax; Östersjön;

    Abstract : .... READ MORE